What is a "Pyrus"?

Pyrus

In botany (the science of plants), Pyrus is the genus of
the pear family, and thus includes all of the pear-producing trees and
shrubs under its taxonomical umbrella.

In PHP (the hypertext programming language), Pyrus is
the next-generation PEAR Installer, a revolutionary package management
and distribution system that extends the functionality of the PEAR Installer's
already advanced functionality. Pyrus is also friendlier to projects
outside of PEAR that wish to take advantage of the strengths of PEAR through
channels.

Pyrus represents the cumulative effort of years of work, experience with the
PEAR Installer since its inception in 1999, and feedback from users like you.
We are very proud to present the best installation tool for PHP.